Wow, with this clear blue water it must be a dream!
Discussion
not everyday, in high season, with low winds - you can get 20-30m visibility and then its a dream. Great life off those sites, no mantas, but lots of everything else, even the odd whale shark. Good memories, but not much fun in rainy season.
Racha is the place to go from april - sep. Not as good but safer and more reliable. And some fun wrecks at shallow, safe depths.